The best fire suppression system out there will not quell an engine bay fire being supplied by a fuel pump churning the fuel constantly into the compartment, by the time the driver realises what is happening its long past the point of no return. The panels of the F40 are very resin rich which also does not help. Only engulfing the flames with vast quantities of foam will halt it.

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One of the reasons F40 along with virtually every other car in the modern era is designed for the fuel pumps not to run when the motor stops. I see that safety measure bypassed all the time by very unwise people and naturally if there is a large leak and it is still running that safety system is negated. Nothing is perfect and even a full firehouse of men and equipment cannot save every structure but it is far better than not bothering to try.